Prevent uncleared memory leaking in rw_i93.cc Bug: 139738828 Test: manual Change-Id: I4e330d4ad1380dbd1e695f81b8183ca8b182b114 Exempt-From-Owner-Approval: new owner approved (cherry picked from commit d8948d4a1fbb00abecc72227a1910d94633a84e8)